521340400233345 has 128 divisors (see below), whose sum is σ = 1076648931901440. Its totient is φ = 209146326497280.

The previous prime is 521340400233239. The next prime is 521340400233353. The reversal of 521340400233345 is 543332004043125.

It is not a de Polignac number, because 521340400233345 - 2¹⁶ = 521340400167809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 61816410 + ... + 69742019.

It is an arithmetic number, because the mean of its divisors is an integer number (8411319780480).

Almost surely, 2^{521340400233345} is an apocalyptic number.

521340400233345 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

521340400233345 is an abundant number, since it is smaller than the sum of its proper divisors (555308531668095).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521340400233345 is a wasteful number, since it uses less digits than its factorization.

521340400233345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131558575.

The product of its (nonzero) digits is 518400, while the sum is 39.

The spelling of 521340400233345 in words is "five hundred twenty-one trillion, three hundred forty billion, four hundred million, two hundred thirty-three thousand, three hundred forty-five".